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Hi,
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The color bit depth is controlled by your PC Video card, monitor will show what it is being fed with. Please check to see if you have correct video card driver installed in your PC and the video card has enough memory to provide the 32bit color depth.

It appears that your video card does not support that resolution and color depth. If you've installed all of the proper drivers from the manufacturer, re-check the maximum specs - sounds like you're looking for HD (1080) and the card can't deliver in full color (32 bit).

Yes the TV could have changed your screen settings (probably to 640X480 resolution).
Go to the Control Panel, then click on Display, then the Settings TAB, then change the Screen Resolution to at least 1024X768 pixels or higher to suit your requirements.
NOTE :- The higher the resolution the smaller Icons and text will be displayed also a lower color quality display ie the best is 32 bit color.

There are three Cathod Ray guns responsible for the millions of colors.All colors are produced by mixing the three basic colors namely Red Green and Blue (RGB) at suitable proportion. If any one of the three guns fail firing then we get improper colors. This can be rectified by
(1) hitting the monitor at the back by keeping it on a pillow the screen facing down - it will reolve the problem if the failure is due to the loosening of the Head due to repeated thermal expansion and contaction.
(2) check the signal cable for loose connection, twisting etc on both ends - at the back of the CPU and Monitor (it is fixed)
TRY YOUR LUCK

This is a fairly common occurrence, typically due to signal loss. The longer the total cable run (monitor to computer connector) the less loss you will have. The longest KVM to computer cable I can use reliably these days is about 12-15? at 1024 x 768 at 32 bit color or 8? for 1280 x 1024 at 32 bit color. Things you can do to reduce loss:
-Reduce the length of the total cable run.
-Increase the quality of the cables used. I only use low loss cables now and have far fewer issues.
-Change the video card, some cards can push a signal a longer distance that others.
-Reduce the resolution/colors the video card displays.
-Try a different monitor or if possible use a different (low loss) cable to connect the monitor to the KVM.
Let us know how it turns out or if you have any other questions.

To prove which Card or monitor are you in the position of either
A- getting hold of another monitor
or
B Another computer connected to troublesome monitor
Either way will establish which is the troublesome one.
Then come back

Your monitor may not be optimized for viewing images. For the best on-screen viewing, set your monitor display as follows:
For computers running the Windows operating system:
Select Start > Settings > Control Panel > Display.
In the Display Properties window, select the Settings tab.
From the Color Quality drop-down menu, select the highest setting your monitor will allow (usually 24 or 32 bit).
Drag the Screen area slider to either 800 by 600 or 1024 by 768.
Click Apply, and then OK.
For computers running the Macintosh operating system:
Access the Monitor Control Panel.
Set the color to Millions of Colors.